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s390/cio: Introduce generic synchronous CHSC IOCTL
[deliverable/linux.git] / drivers / s390 / cio / chsc_sch.c
CommitLineData
9d92a7e1
CH		 1/*
2 * Driver for s390 chsc subchannels
3 *
65b4e403 4 * Copyright IBM Corp. 2008, 2011
ad285ae9 5 *
9d92a7e1
CH		 6 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
7 *
8 */
9
5a0e3ad6 10#include <linux/slab.h>
048cd4e5 11#include <linux/compat.h>
9d92a7e1
CH		 12#include <linux/device.h>
13#include <linux/module.h>
14#include <linux/uaccess.h>
15#include <linux/miscdevice.h>
65b4e403 16#include <linux/kernel_stat.h>
9d92a7e1 17
44ee6a85 18#include <asm/compat.h>
9d92a7e1
CH		 19#include <asm/cio.h>
20#include <asm/chsc.h>
21#include <asm/isc.h>
22
23#include "cio.h"
24#include "cio_debug.h"
25#include "css.h"
26#include "chsc_sch.h"
27#include "ioasm.h"
28
29static debug_info_t *chsc_debug_msg_id;
30static debug_info_t *chsc_debug_log_id;
31
32#define CHSC_MSG(imp, args...) do { \
33 debug_sprintf_event(chsc_debug_msg_id, imp , ##args); \
34 } while (0)
35
36#define CHSC_LOG(imp, txt) do { \
37 debug_text_event(chsc_debug_log_id, imp , txt); \
38 } while (0)
39
40static void CHSC_LOG_HEX(int level, void *data, int length)
41{
42 while (length > 0) {
43 debug_event(chsc_debug_log_id, level, data, length);
44 length -= chsc_debug_log_id->buf_size;
45 data += chsc_debug_log_id->buf_size;
46 }
47}
48
49MODULE_AUTHOR("IBM Corporation");
50MODULE_DESCRIPTION("driver for s390 chsc subchannels");
51MODULE_LICENSE("GPL");
52
53static void chsc_subchannel_irq(struct subchannel *sch)
54{
85fb534e 55 struct chsc_private *private = dev_get_drvdata(&sch->dev);
9d92a7e1 56 struct chsc_request *request = private->request;
cbb870c8 57 struct irb *irb = (struct irb *)&S390_lowcore.irb;
9d92a7e1
CH		 58
59 CHSC_LOG(4, "irb");
60 CHSC_LOG_HEX(4, irb, sizeof(*irb));
420f42ec 61 inc_irq_stat(IRQIO_CSC);
65b4e403 62
9d92a7e1
CH		 63 /* Copy irb to provided request and set done. */
64 if (!request) {
65 CHSC_MSG(0, "Interrupt on sch 0.%x.%04x with no request\n",
66 sch->schid.ssid, sch->schid.sch_no);
67 return;
68 }
69 private->request = NULL;
70 memcpy(&request->irb, irb, sizeof(*irb));
cdb912a4 71 cio_update_schib(sch);
9d92a7e1
CH		 72 complete(&request->completion);
73 put_device(&sch->dev);
74}
75
76static int chsc_subchannel_probe(struct subchannel *sch)
77{
78 struct chsc_private *private;
79 int ret;
80
81 CHSC_MSG(6, "Detected chsc subchannel 0.%x.%04x\n",
82 sch->schid.ssid, sch->schid.sch_no);
83 sch->isc = CHSC_SCH_ISC;
84 private = kzalloc(sizeof(*private), GFP_KERNEL);
85 if (!private)
86 return -ENOMEM;
85fb534e 87 dev_set_drvdata(&sch->dev, private);
9d92a7e1
CH		 88 ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch);
89 if (ret) {
90 CHSC_MSG(0, "Failed to enable 0.%x.%04x: %d\n",
91 sch->schid.ssid, sch->schid.sch_no, ret);
85fb534e 92 dev_set_drvdata(&sch->dev, NULL);
9d92a7e1
CH		 93 kfree(private);
94 } else {
f67f129e
ML		 95 if (dev_get_uevent_suppress(&sch->dev)) {
96 dev_set_uevent_suppress(&sch->dev, 0);
9d92a7e1
CH		 97 kobject_uevent(&sch->dev.kobj, KOBJ_ADD);
98 }
99 }
100 return ret;
101}
102
103static int chsc_subchannel_remove(struct subchannel *sch)
104{
105 struct chsc_private *private;
106
107 cio_disable_subchannel(sch);
85fb534e
SO		 108 private = dev_get_drvdata(&sch->dev);
109 dev_set_drvdata(&sch->dev, NULL);
9d92a7e1
CH		 110 if (private->request) {
111 complete(&private->request->completion);
112 put_device(&sch->dev);
113 }
114 kfree(private);
115 return 0;
116}
117
118static void chsc_subchannel_shutdown(struct subchannel *sch)
119{
120 cio_disable_subchannel(sch);
121}
122
ad285ae9
CH		 123static int chsc_subchannel_prepare(struct subchannel *sch)
124{
125 int cc;
126 struct schib schib;
127 /*
128 * Don't allow suspend while the subchannel is not idle
129 * since we don't have a way to clear the subchannel and
130 * cannot disable it with a request running.
131 */
8821d24c 132 cc = stsch_err(sch->schid, &schib);
ad285ae9
CH		 133 if (!cc && scsw_stctl(&schib.scsw))
134 return -EAGAIN;
135 return 0;
136}
137
138static int chsc_subchannel_freeze(struct subchannel *sch)
139{
140 return cio_disable_subchannel(sch);
141}
142
143static int chsc_subchannel_restore(struct subchannel *sch)
144{
145 return cio_enable_subchannel(sch, (u32)(unsigned long)sch);
146}
147
9d92a7e1
CH		 148static struct css_device_id chsc_subchannel_ids[] = {
149 { .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, },
150 { /* end of list */ },
151};
152MODULE_DEVICE_TABLE(css, chsc_subchannel_ids);
153
154static struct css_driver chsc_subchannel_driver = {
e6aed122
SO		 155 .drv = {
156 .owner = THIS_MODULE,
157 .name = "chsc_subchannel",
158 },
9d92a7e1
CH		 159 .subchannel_type = chsc_subchannel_ids,
160 .irq = chsc_subchannel_irq,
161 .probe = chsc_subchannel_probe,
162 .remove = chsc_subchannel_remove,
163 .shutdown = chsc_subchannel_shutdown,
ad285ae9
CH		 164 .prepare = chsc_subchannel_prepare,
165 .freeze = chsc_subchannel_freeze,
166 .thaw = chsc_subchannel_restore,
167 .restore = chsc_subchannel_restore,
9d92a7e1
CH		 168};
169
170static int __init chsc_init_dbfs(void)
171{
172 chsc_debug_msg_id = debug_register("chsc_msg", 16, 1,
173 16 * sizeof(long));
174 if (!chsc_debug_msg_id)
175 goto out;
176 debug_register_view(chsc_debug_msg_id, &debug_sprintf_view);
177 debug_set_level(chsc_debug_msg_id, 2);
178 chsc_debug_log_id = debug_register("chsc_log", 16, 1, 16);
179 if (!chsc_debug_log_id)
180 goto out;
181 debug_register_view(chsc_debug_log_id, &debug_hex_ascii_view);
182 debug_set_level(chsc_debug_log_id, 2);
183 return 0;
184out:
185 if (chsc_debug_msg_id)
186 debug_unregister(chsc_debug_msg_id);
187 return -ENOMEM;
188}
189
190static void chsc_remove_dbfs(void)
191{
192 debug_unregister(chsc_debug_log_id);
193 debug_unregister(chsc_debug_msg_id);
194}
195
196static int __init chsc_init_sch_driver(void)
197{
198 return css_driver_register(&chsc_subchannel_driver);
199}
200
201static void chsc_cleanup_sch_driver(void)
202{
203 css_driver_unregister(&chsc_subchannel_driver);
204}
205
206static DEFINE_SPINLOCK(chsc_lock);
207
208static int chsc_subchannel_match_next_free(struct device *dev, void *data)
209{
210 struct subchannel *sch = to_subchannel(dev);
211
212 return sch->schib.pmcw.ena && !scsw_fctl(&sch->schib.scsw);
213}
214
215static struct subchannel *chsc_get_next_subchannel(struct subchannel *sch)
216{
217 struct device *dev;
218
219 dev = driver_find_device(&chsc_subchannel_driver.drv,
220 sch ? &sch->dev : NULL, NULL,
221 chsc_subchannel_match_next_free);
222 return dev ? to_subchannel(dev) : NULL;
223}
224
225/**
226 * chsc_async() - try to start a chsc request asynchronously
227 * @chsc_area: request to be started
228 * @request: request structure to associate
229 *
230 * Tries to start a chsc request on one of the existing chsc subchannels.
231 * Returns:
232 * %0 if the request was performed synchronously
233 * %-EINPROGRESS if the request was successfully started
234 * %-EBUSY if all chsc subchannels are busy
235 * %-ENODEV if no chsc subchannels are available
236 * Context:
237 * interrupts disabled, chsc_lock held
238 */
239static int chsc_async(struct chsc_async_area *chsc_area,
240 struct chsc_request *request)
241{
242 int cc;
243 struct chsc_private *private;
244 struct subchannel *sch = NULL;
245 int ret = -ENODEV;
246 char dbf[10];
247
d1bf8590 248 chsc_area->header.key = PAGE_DEFAULT_KEY >> 4;
9d92a7e1
CH		 249 while ((sch = chsc_get_next_subchannel(sch))) {
250 spin_lock(sch->lock);
85fb534e 251 private = dev_get_drvdata(&sch->dev);
9d92a7e1
CH		 252 if (private->request) {
253 spin_unlock(sch->lock);
254 ret = -EBUSY;
255 continue;
256 }
257 chsc_area->header.sid = sch->schid;
258 CHSC_LOG(2, "schid");
259 CHSC_LOG_HEX(2, &sch->schid, sizeof(sch->schid));
260 cc = chsc(chsc_area);
261 sprintf(dbf, "cc:%d", cc);
262 CHSC_LOG(2, dbf);
263 switch (cc) {
264 case 0:
265 ret = 0;
266 break;
267 case 1:
268 sch->schib.scsw.cmd.fctl |= SCSW_FCTL_START_FUNC;
269 ret = -EINPROGRESS;
270 private->request = request;
271 break;
272 case 2:
273 ret = -EBUSY;
274 break;
275 default:
276 ret = -ENODEV;
277 }
278 spin_unlock(sch->lock);
279 CHSC_MSG(2, "chsc on 0.%x.%04x returned cc=%d\n",
280 sch->schid.ssid, sch->schid.sch_no, cc);
281 if (ret == -EINPROGRESS)
282 return -EINPROGRESS;
283 put_device(&sch->dev);
284 if (ret == 0)
285 return 0;
286 }
287 return ret;
288}
289
64150adf 290static void chsc_log_command(void *chsc_area)
9d92a7e1
CH		 291{
292 char dbf[10];
293
64150adf 294 sprintf(dbf, "CHSC:%x", ((uint16_t *)chsc_area)[1]);
9d92a7e1
CH		 295 CHSC_LOG(0, dbf);
296 CHSC_LOG_HEX(0, chsc_area, 32);
297}
298
299static int chsc_examine_irb(struct chsc_request *request)
300{
301 int backed_up;
302
b2bbb642 303 if (!(scsw_stctl(&request->irb.scsw) & SCSW_STCTL_STATUS_PEND))
9d92a7e1
CH		 304 return -EIO;
305 backed_up = scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHAIN_CHECK;
306 request->irb.scsw.cmd.cstat &= ~SCHN_STAT_CHAIN_CHECK;
307 if (scsw_cstat(&request->irb.scsw) == 0)
308 return 0;
309 if (!backed_up)
310 return 0;
311 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROG_CHECK)
312 return -EIO;
313 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROT_CHECK)
314 return -EPERM;
315 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_DATA_CHK)
316 return -EAGAIN;
317 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_CTRL_CHK)
318 return -EAGAIN;
319 return -EIO;
320}
321
322static int chsc_ioctl_start(void __user *user_area)
323{
324 struct chsc_request *request;
325 struct chsc_async_area *chsc_area;
326 int ret;
327 char dbf[10];
328
329 if (!css_general_characteristics.dynio)
330 /* It makes no sense to try. */
331 return -EOPNOTSUPP;
332 chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL);
333 if (!chsc_area)
334 return -ENOMEM;
335 request = kzalloc(sizeof(*request), GFP_KERNEL);
336 if (!request) {
337 ret = -ENOMEM;
338 goto out_free;
339 }
340 init_completion(&request->completion);
341 if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) {
342 ret = -EFAULT;
343 goto out_free;
344 }
345 chsc_log_command(chsc_area);
346 spin_lock_irq(&chsc_lock);
347 ret = chsc_async(chsc_area, request);
348 spin_unlock_irq(&chsc_lock);
349 if (ret == -EINPROGRESS) {
350 wait_for_completion(&request->completion);
351 ret = chsc_examine_irb(request);
352 }
353 /* copy area back to user */
354 if (!ret)
355 if (copy_to_user(user_area, chsc_area, PAGE_SIZE))
356 ret = -EFAULT;
357out_free:
358 sprintf(dbf, "ret:%d", ret);
359 CHSC_LOG(0, dbf);
360 kfree(request);
361 free_page((unsigned long)chsc_area);
362 return ret;
363}
364
64150adf
MH		 365static int chsc_ioctl_start_sync(void __user *user_area)
366{
367 struct chsc_sync_area *chsc_area;
368 int ret, ccode;
369
370 chsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
371 if (!chsc_area)
372 return -ENOMEM;
373 if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) {
374 ret = -EFAULT;
375 goto out_free;
376 }
377 if (chsc_area->header.code & 0x4000) {
378 ret = -EINVAL;
379 goto out_free;
380 }
381 chsc_log_command(chsc_area);
382 ccode = chsc(chsc_area);
383 if (ccode != 0) {
384 ret = -EIO;
385 goto out_free;
386 }
387 if (copy_to_user(user_area, chsc_area, PAGE_SIZE))
388 ret = -EFAULT;
389 else
390 ret = 0;
391out_free:
392 free_page((unsigned long)chsc_area);
393 return ret;
394}
395
9d92a7e1
CH		 396static int chsc_ioctl_info_channel_path(void __user *user_cd)
397{
398 struct chsc_chp_cd *cd;
399 int ret, ccode;
400 struct {
401 struct chsc_header request;
402 u32 : 2;
403 u32 m : 1;
404 u32 : 1;
405 u32 fmt1 : 4;
406 u32 cssid : 8;
407 u32 : 8;
408 u32 first_chpid : 8;
409 u32 : 24;
410 u32 last_chpid : 8;
411 u32 : 32;
412 struct chsc_header response;
413 u8 data[PAGE_SIZE - 20];
414 } __attribute__ ((packed)) *scpcd_area;
415
416 scpcd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
417 if (!scpcd_area)
418 return -ENOMEM;
419 cd = kzalloc(sizeof(*cd), GFP_KERNEL);
420 if (!cd) {
421 ret = -ENOMEM;
422 goto out_free;
423 }
424 if (copy_from_user(cd, user_cd, sizeof(*cd))) {
425 ret = -EFAULT;
426 goto out_free;
427 }
428 scpcd_area->request.length = 0x0010;
429 scpcd_area->request.code = 0x0028;
430 scpcd_area->m = cd->m;
431 scpcd_area->fmt1 = cd->fmt;
432 scpcd_area->cssid = cd->chpid.cssid;
433 scpcd_area->first_chpid = cd->chpid.id;
434 scpcd_area->last_chpid = cd->chpid.id;
435
436 ccode = chsc(scpcd_area);
437 if (ccode != 0) {
438 ret = -EIO;
439 goto out_free;
440 }
441 if (scpcd_area->response.code != 0x0001) {
442 ret = -EIO;
443 CHSC_MSG(0, "scpcd: response code=%x\n",
444 scpcd_area->response.code);
445 goto out_free;
446 }
447 memcpy(&cd->cpcb, &scpcd_area->response, scpcd_area->response.length);
448 if (copy_to_user(user_cd, cd, sizeof(*cd)))
449 ret = -EFAULT;
450 else
451 ret = 0;
452out_free:
453 kfree(cd);
454 free_page((unsigned long)scpcd_area);
455 return ret;
456}
457
458static int chsc_ioctl_info_cu(void __user *user_cd)
459{
460 struct chsc_cu_cd *cd;
461 int ret, ccode;
462 struct {
463 struct chsc_header request;
464 u32 : 2;
465 u32 m : 1;
466 u32 : 1;
467 u32 fmt1 : 4;
468 u32 cssid : 8;
469 u32 : 8;
470 u32 first_cun : 8;
471 u32 : 24;
472 u32 last_cun : 8;
473 u32 : 32;
474 struct chsc_header response;
475 u8 data[PAGE_SIZE - 20];
476 } __attribute__ ((packed)) *scucd_area;
477
478 scucd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
479 if (!scucd_area)
480 return -ENOMEM;
481 cd = kzalloc(sizeof(*cd), GFP_KERNEL);
482 if (!cd) {
483 ret = -ENOMEM;
484 goto out_free;
485 }
486 if (copy_from_user(cd, user_cd, sizeof(*cd))) {
487 ret = -EFAULT;
488 goto out_free;
489 }
490 scucd_area->request.length = 0x0010;
491 scucd_area->request.code = 0x0028;
492 scucd_area->m = cd->m;
493 scucd_area->fmt1 = cd->fmt;
494 scucd_area->cssid = cd->cssid;
495 scucd_area->first_cun = cd->cun;
496 scucd_area->last_cun = cd->cun;
497
498 ccode = chsc(scucd_area);
499 if (ccode != 0) {
500 ret = -EIO;
501 goto out_free;
502 }
503 if (scucd_area->response.code != 0x0001) {
504 ret = -EIO;
505 CHSC_MSG(0, "scucd: response code=%x\n",
506 scucd_area->response.code);
507 goto out_free;
508 }
509 memcpy(&cd->cucb, &scucd_area->response, scucd_area->response.length);
510 if (copy_to_user(user_cd, cd, sizeof(*cd)))
511 ret = -EFAULT;
512 else
513 ret = 0;
514out_free:
515 kfree(cd);
516 free_page((unsigned long)scucd_area);
517 return ret;
518}
519
520static int chsc_ioctl_info_sch_cu(void __user *user_cud)
521{
522 struct chsc_sch_cud *cud;
523 int ret, ccode;
524 struct {
525 struct chsc_header request;
526 u32 : 2;
527 u32 m : 1;
528 u32 : 5;
529 u32 fmt1 : 4;
530 u32 : 2;
531 u32 ssid : 2;
532 u32 first_sch : 16;
533 u32 : 8;
534 u32 cssid : 8;
535 u32 last_sch : 16;
536 u32 : 32;
537 struct chsc_header response;
538 u8 data[PAGE_SIZE - 20];
539 } __attribute__ ((packed)) *sscud_area;
540
541 sscud_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
542 if (!sscud_area)
543 return -ENOMEM;
544 cud = kzalloc(sizeof(*cud), GFP_KERNEL);
545 if (!cud) {
546 ret = -ENOMEM;
547 goto out_free;
548 }
549 if (copy_from_user(cud, user_cud, sizeof(*cud))) {
550 ret = -EFAULT;
551 goto out_free;
552 }
553 sscud_area->request.length = 0x0010;
554 sscud_area->request.code = 0x0006;
555 sscud_area->m = cud->schid.m;
556 sscud_area->fmt1 = cud->fmt;
557 sscud_area->ssid = cud->schid.ssid;
558 sscud_area->first_sch = cud->schid.sch_no;
559 sscud_area->cssid = cud->schid.cssid;
560 sscud_area->last_sch = cud->schid.sch_no;
561
562 ccode = chsc(sscud_area);
563 if (ccode != 0) {
564 ret = -EIO;
565 goto out_free;
566 }
567 if (sscud_area->response.code != 0x0001) {
568 ret = -EIO;
569 CHSC_MSG(0, "sscud: response code=%x\n",
570 sscud_area->response.code);
571 goto out_free;
572 }
573 memcpy(&cud->scub, &sscud_area->response, sscud_area->response.length);
574 if (copy_to_user(user_cud, cud, sizeof(*cud)))
575 ret = -EFAULT;
576 else
577 ret = 0;
578out_free:
579 kfree(cud);
580 free_page((unsigned long)sscud_area);
581 return ret;
582}
583
584static int chsc_ioctl_conf_info(void __user *user_ci)
585{
586 struct chsc_conf_info *ci;
587 int ret, ccode;
588 struct {
589 struct chsc_header request;
590 u32 : 2;
591 u32 m : 1;
592 u32 : 1;
593 u32 fmt1 : 4;
594 u32 cssid : 8;
595 u32 : 6;
596 u32 ssid : 2;
597 u32 : 8;
598 u64 : 64;
599 struct chsc_header response;
600 u8 data[PAGE_SIZE - 20];
601 } __attribute__ ((packed)) *sci_area;
602
603 sci_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
604 if (!sci_area)
605 return -ENOMEM;
606 ci = kzalloc(sizeof(*ci), GFP_KERNEL);
607 if (!ci) {
608 ret = -ENOMEM;
609 goto out_free;
610 }
611 if (copy_from_user(ci, user_ci, sizeof(*ci))) {
612 ret = -EFAULT;
613 goto out_free;
614 }
615 sci_area->request.length = 0x0010;
616 sci_area->request.code = 0x0012;
617 sci_area->m = ci->id.m;
618 sci_area->fmt1 = ci->fmt;
619 sci_area->cssid = ci->id.cssid;
620 sci_area->ssid = ci->id.ssid;
621
622 ccode = chsc(sci_area);
623 if (ccode != 0) {
624 ret = -EIO;
625 goto out_free;
626 }
627 if (sci_area->response.code != 0x0001) {
628 ret = -EIO;
629 CHSC_MSG(0, "sci: response code=%x\n",
630 sci_area->response.code);
631 goto out_free;
632 }
633 memcpy(&ci->scid, &sci_area->response, sci_area->response.length);
634 if (copy_to_user(user_ci, ci, sizeof(*ci)))
635 ret = -EFAULT;
636 else
637 ret = 0;
638out_free:
639 kfree(ci);
640 free_page((unsigned long)sci_area);
641 return ret;
642}
643
644static int chsc_ioctl_conf_comp_list(void __user *user_ccl)
645{
646 struct chsc_comp_list *ccl;
647 int ret, ccode;
648 struct {
649 struct chsc_header request;
650 u32 ctype : 8;
651 u32 : 4;
652 u32 fmt : 4;
653 u32 : 16;
654 u64 : 64;
655 u32 list_parm[2];
656 u64 : 64;
657 struct chsc_header response;
658 u8 data[PAGE_SIZE - 36];
659 } __attribute__ ((packed)) *sccl_area;
660 struct {
661 u32 m : 1;
662 u32 : 31;
663 u32 cssid : 8;
664 u32 : 16;
665 u32 chpid : 8;
666 } __attribute__ ((packed)) *chpid_parm;
667 struct {
668 u32 f_cssid : 8;
669 u32 l_cssid : 8;
670 u32 : 16;
671 u32 res;
672 } __attribute__ ((packed)) *cssids_parm;
673
674 sccl_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
675 if (!sccl_area)
676 return -ENOMEM;
677 ccl = kzalloc(sizeof(*ccl), GFP_KERNEL);
678 if (!ccl) {
679 ret = -ENOMEM;
680 goto out_free;
681 }
682 if (copy_from_user(ccl, user_ccl, sizeof(*ccl))) {
683 ret = -EFAULT;
684 goto out_free;
685 }
686 sccl_area->request.length = 0x0020;
687 sccl_area->request.code = 0x0030;
688 sccl_area->fmt = ccl->req.fmt;
689 sccl_area->ctype = ccl->req.ctype;
690 switch (sccl_area->ctype) {
691 case CCL_CU_ON_CHP:
692 case CCL_IOP_CHP:
693 chpid_parm = (void *)&sccl_area->list_parm;
694 chpid_parm->m = ccl->req.chpid.m;
695 chpid_parm->cssid = ccl->req.chpid.chp.cssid;
696 chpid_parm->chpid = ccl->req.chpid.chp.id;
697 break;
698 case CCL_CSS_IMG:
699 case CCL_CSS_IMG_CONF_CHAR:
700 cssids_parm = (void *)&sccl_area->list_parm;
701 cssids_parm->f_cssid = ccl->req.cssids.f_cssid;
702 cssids_parm->l_cssid = ccl->req.cssids.l_cssid;
703 break;
704 }
705 ccode = chsc(sccl_area);
706 if (ccode != 0) {
707 ret = -EIO;
708 goto out_free;
709 }
710 if (sccl_area->response.code != 0x0001) {
711 ret = -EIO;
712 CHSC_MSG(0, "sccl: response code=%x\n",
713 sccl_area->response.code);
714 goto out_free;
715 }
716 memcpy(&ccl->sccl, &sccl_area->response, sccl_area->response.length);
717 if (copy_to_user(user_ccl, ccl, sizeof(*ccl)))
718 ret = -EFAULT;
719 else
720 ret = 0;
721out_free:
722 kfree(ccl);
723 free_page((unsigned long)sccl_area);
724 return ret;
725}
726
727static int chsc_ioctl_chpd(void __user *user_chpd)
728{
906c9768 729 struct chsc_scpd *scpd_area;
9d92a7e1
CH		 730 struct chsc_cpd_info *chpd;
731 int ret;
732
733 chpd = kzalloc(sizeof(*chpd), GFP_KERNEL);
906c9768
SO		 734 scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
735 if (!scpd_area || !chpd) {
736 ret = -ENOMEM;
737 goto out_free;
738 }
9d92a7e1
CH		 739 if (copy_from_user(chpd, user_chpd, sizeof(*chpd))) {
740 ret = -EFAULT;
741 goto out_free;
742 }
743 ret = chsc_determine_channel_path_desc(chpd->chpid, chpd->fmt,
744 chpd->rfmt, chpd->c, chpd->m,
906c9768 745 scpd_area);
9d92a7e1
CH		 746 if (ret)
747 goto out_free;
906c9768 748 memcpy(&chpd->chpdb, &scpd_area->response, scpd_area->response.length);
9d92a7e1
CH		 749 if (copy_to_user(user_chpd, chpd, sizeof(*chpd)))
750 ret = -EFAULT;
751out_free:
752 kfree(chpd);
906c9768 753 free_page((unsigned long)scpd_area);
9d92a7e1
CH		 754 return ret;
755}
756
757static int chsc_ioctl_dcal(void __user *user_dcal)
758{
759 struct chsc_dcal *dcal;
760 int ret, ccode;
761 struct {
762 struct chsc_header request;
763 u32 atype : 8;
764 u32 : 4;
765 u32 fmt : 4;
766 u32 : 16;
767 u32 res0[2];
768 u32 list_parm[2];
769 u32 res1[2];
770 struct chsc_header response;
771 u8 data[PAGE_SIZE - 36];
772 } __attribute__ ((packed)) *sdcal_area;
773
774 sdcal_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
775 if (!sdcal_area)
776 return -ENOMEM;
777 dcal = kzalloc(sizeof(*dcal), GFP_KERNEL);
778 if (!dcal) {
779 ret = -ENOMEM;
780 goto out_free;
781 }
782 if (copy_from_user(dcal, user_dcal, sizeof(*dcal))) {
783 ret = -EFAULT;
784 goto out_free;
785 }
786 sdcal_area->request.length = 0x0020;
787 sdcal_area->request.code = 0x0034;
788 sdcal_area->atype = dcal->req.atype;
789 sdcal_area->fmt = dcal->req.fmt;
790 memcpy(&sdcal_area->list_parm, &dcal->req.list_parm,
791 sizeof(sdcal_area->list_parm));
792
793 ccode = chsc(sdcal_area);
794 if (ccode != 0) {
795 ret = -EIO;
796 goto out_free;
797 }
798 if (sdcal_area->response.code != 0x0001) {
799 ret = -EIO;
800 CHSC_MSG(0, "sdcal: response code=%x\n",
801 sdcal_area->response.code);
802 goto out_free;
803 }
804 memcpy(&dcal->sdcal, &sdcal_area->response,
805 sdcal_area->response.length);
806 if (copy_to_user(user_dcal, dcal, sizeof(*dcal)))
807 ret = -EFAULT;
808 else
809 ret = 0;
810out_free:
811 kfree(dcal);
812 free_page((unsigned long)sdcal_area);
813 return ret;
814}
815
816static long chsc_ioctl(struct file *filp, unsigned int cmd,
817 unsigned long arg)
818{
44ee6a85
HC		 819 void __user *argp;
820
9d92a7e1 821 CHSC_MSG(2, "chsc_ioctl called, cmd=%x\n", cmd);
44ee6a85
HC		 822 if (is_compat_task())
823 argp = compat_ptr(arg);
824 else
825 argp = (void __user *)arg;
9d92a7e1
CH		 826 switch (cmd) {
827 case CHSC_START:
44ee6a85 828 return chsc_ioctl_start(argp);
64150adf
MH		 829 case CHSC_START_SYNC:
830 return chsc_ioctl_start_sync(argp);
9d92a7e1 831 case CHSC_INFO_CHANNEL_PATH:
44ee6a85 832 return chsc_ioctl_info_channel_path(argp);
9d92a7e1 833 case CHSC_INFO_CU:
44ee6a85 834 return chsc_ioctl_info_cu(argp);
9d92a7e1 835 case CHSC_INFO_SCH_CU:
44ee6a85 836 return chsc_ioctl_info_sch_cu(argp);
9d92a7e1 837 case CHSC_INFO_CI:
44ee6a85 838 return chsc_ioctl_conf_info(argp);
9d92a7e1 839 case CHSC_INFO_CCL:
44ee6a85 840 return chsc_ioctl_conf_comp_list(argp);
9d92a7e1 841 case CHSC_INFO_CPD:
44ee6a85 842 return chsc_ioctl_chpd(argp);
9d92a7e1 843 case CHSC_INFO_DCAL:
44ee6a85 844 return chsc_ioctl_dcal(argp);
9d92a7e1
CH		 845 default: /* unknown ioctl number */
846 return -ENOIOCTLCMD;
847 }
848}
849
850static const struct file_operations chsc_fops = {
851 .owner = THIS_MODULE,
58ea91c0 852 .open = nonseekable_open,
9d92a7e1
CH		 853 .unlocked_ioctl = chsc_ioctl,
854 .compat_ioctl = chsc_ioctl,
6038f373 855 .llseek = no_llseek,
9d92a7e1
CH		 856};
857
858static struct miscdevice chsc_misc_device = {
859 .minor = MISC_DYNAMIC_MINOR,
860 .name = "chsc",
861 .fops = &chsc_fops,
862};
863
864static int __init chsc_misc_init(void)
865{
866 return misc_register(&chsc_misc_device);
867}
868
869static void chsc_misc_cleanup(void)
870{
871 misc_deregister(&chsc_misc_device);
872}
873
874static int __init chsc_sch_init(void)
875{
876 int ret;
877
878 ret = chsc_init_dbfs();
879 if (ret)
880 return ret;
881 isc_register(CHSC_SCH_ISC);
882 ret = chsc_init_sch_driver();
883 if (ret)
884 goto out_dbf;
885 ret = chsc_misc_init();
886 if (ret)
887 goto out_driver;
888 return ret;
889out_driver:
890 chsc_cleanup_sch_driver();
891out_dbf:
892 isc_unregister(CHSC_SCH_ISC);
893 chsc_remove_dbfs();
894 return ret;
895}
896
897static void __exit chsc_sch_exit(void)
898{
899 chsc_misc_cleanup();
900 chsc_cleanup_sch_driver();
901 isc_unregister(CHSC_SCH_ISC);
902 chsc_remove_dbfs();
903}
904
905module_init(chsc_sch_init);
906module_exit(chsc_sch_exit);
Linux kernel - Deliverables
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